An organization currently uses a multi-node Mule runtime deployment model within their datacenter, so each...

Explanation

* Organization can continue using existing load balancer even if backend application changes are there. So option A is ruled out.

* As Mule runtime is within their datacenter, this model is RTF and not PCE. So option C is ruled out.

Mule runtime deployment model within their datacenter, so each Mule runtime hosts several Mule applications -- This mean PCE or Hybird not RTF - Also mentioned in Question is that - Mule runtime is hosting several Mule Application, so that also rules out RTF and as for hosting multiple Application it will have Domain project which need redesign to make it microservice architecture

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Correct Answer: Required redesign of Mule applications to follow microservice architecture principles